And since Kauai is tropical, anytime you arrive, there are flowers. Not always the same ones--some tropical plants do have annual cycles--but various and interesting flowers, all the time.
Naming the above flowers, for example as captions, seemed intrusive.
So let me name the ones I can:
shampoo ginger, Zingiber zerumbet, (ginger family, Zingiberaceae) from India;
Hibiscus rosa-sinensis, Chinese hibiscus (hibiscus family, Malvaceae), from China;
the white flower is a jasmine. It was a very fragrant shrub. However, there are a lot of species of jasmines and jasmine-relatives from all over the tropics;
the red is Sterculia foetida, stinky sterculia (sterculia family, Sterculiaceae), from lands surrounding the Inidian Ocean;
the plant with the pink flower, purple leaves is Tradescantia pallida (dayflower family, Commelinaceae), from Mexico;
next is Brazilian red cloak, Megaskepasma erythrochlamys (Acanthaceae) native to northern South America and Central America;
Catharanthus roseus, Madagascar periwinkle or vinca native to Madagascar (Apocynaceae, dogbane family);
daylily, Hemerocallis hybrid (daylily family Xanthorrhoeaceae) native to central Asia;
Duranta erecta, pigeonberry (vervain family, Verbenaceae) from the American tropics.
Plant Finder at Missouri Botanical Garden http://www.missouribotanicalgarden.org/plantfinder/plantfindersearch.aspx accessed June 2014.
Pocket Guide. Hawaii Trees & Wildflowers. Waterford Press, 2009.
Zuchowski, W. Tropical Plants of Costa Rica. Cornell University Press, Ithaca,. 2007.
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